Fouad Rami wrote: > Hi Bjorn, > > Just a few comments on your note (AnNote#23). > > - Looking at Fig.4 in the report of Claus and Christian (AnNote#22), > one can see clearly that around the nominal intersection point > there is no significant dependence of Mcut on the vertex (all > histograms and curves are absolutely flat). Therefore, I would > expect that both centrality recipes (JH and NBI) should give > exactly the same results if a narrow cut is imposed on the vertex. > It would be therefore very nice if you could compare the results > (centrality dependence of dN/deta) using both methods under > (for example) a +-5cm vertex cut (statistics should be sufficient, > in my old analysis I even used +-3cm). I don't think that both methods will give the same results. Neither method will show much (if any!) variation over such a tiny vertex range. The two results will, though, give different results, since the two definitions of, for example, 5%, are not the same. Cheers, -- Ian-------------------------------------------------------------------- | I.G. Bearden | | Niels Bohr Institute Tb 3 email: bearden@nbi.dk | | Blegdamsvej 17 phone: (+45) 35 32 53 23 | | København Ø FAX: (+45) 31 42 10 16 | | Danmark | ----------------------------------------------------------------------
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